Remote Server

1. A remote server that receives information for machine identification, information on an operating day, position information, information on a load factor, information on a rotational speed of an engine, information on a moving speed, and information on a fuel consumption amount, from a terminal server provided in a machine, wherein the remote server identifies a working position by a GPS, identifies from the working position a farm field in which work is currently performed, selects, based on the information for machine identification, past working periods during which a same machine in a same farm field is in an operation status corresponding to a current load factor, selects a period during which the fuel consumption amount is minimum in the selected past working periods, and compares a current fuel consumption amount with the past minimum fuel consumption amount, and if the current fuel consumption amount is larger than the past minimum fuel consumption amount, the remote server transmits the information on the rotational speed of the engine and a speed change pattern of each working unit during a working period of the minimum fuel consumption amount to a predetermined communication terminal corresponding to the information for machine identification.

2. A remote server that receives information for machine identification, information on an operating day, position information, information on a load factor, information on a rotational speed of an engine, information on a moving speed, and information on a fuel consumption amount, from a terminal server provided in a machine, wherein the remote server identifies a working position by a GPS, identifies from the working position a farm field in which work is currently performed, identifies a working season from the operating day, identifies past working periods during which a machine type same as a machine type identified based on the information for machine identification has a same load factor in a same working season in a same farm field, identifies a period during which a fuel consumption amount is minimum in the identified past working periods, and compares a fuel consumption amount of a working machine being currently working with the minimum fuel consumption amount, and if the fuel consumption amount of the working machine being currently working is larger than the minimum fuel consumption amount, the remote server transmits the information on the rotational speed of the engine and a speed change pattern of each working unit of the working machine whose fuel consumption amount is minimum during the period of the minimum fuel consumption amount to a predetermined communication terminal corresponding to the information for machine identification.

3. A remote server that receives information for machine identification, information on a load factor, information on a rotational speed of an engine, information on a moving speed, and information on a fuel consumption amount, from a terminal server provided in a machine, wherein the remote server identifies a type of the engine based on the information for machine identification, identifies the rotational speed of the engine, torque, output, and a characteristic map of the fuel consumption amount which correspond to the type of the engine, identifies corresponding output in the characteristic map from the rotational speed of the engine and the load factor, and transmits, based on the characteristic map, the rotational speed of the engine and a speed change pattern of each working unit at an operating point of a minimum fuel consumption amount in the specified output, to a predetermined communication terminal corresponding to the information for machine identification.